[llvm] [AArch64][SVE] Detect MOV (imm, pred, zeroing/merging) (PR #116032)

[Paul Walker via llvm-commits]

https://github.com/paulwalker-arm commented:

Can you say where the uses are coming from?  I ask because I'm wondering if we should instead be lowering the intrinsics to select instructions to allow generic combines to do their thing. Plus we already have patterns to spot the select based sequences.

https://github.com/llvm/llvm-project/pull/116032